An analysis of contention-based feedback schemes for score-based schedulers

Seung Jun Baek

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

In this paper we investigate channel state information (CSI) feedback strategy for a basestation (BS) scheduling multiple users for data transmissions in the downlink. For the purpose of fair provisioning of service among users with possibly heterogeneous channel statistics, we adopt scheduling algorithms based on scores: specifically the maximum quantile (MQ) scheduling is used as one of such schedulers where the score corresponds to the quantile of instantaneous SINR. Our feedback scheme is based on contention where we would like to guarantee a set of arbitrary long-term average scores to users and study feedback methods which enable such assignment. We show how the scores are assigned in a maximal manner leveraging the framework of maximum weight schedulers. The problem turns out to be nonconvex, however for two users case we present an explicit formula of feedback for the optimal score assignment. We derive the expression for the optimal feedback parameters which turn out to be asymmetric among users. We analytically show that, even for contention based feedback, by optimally tuning the feedback parameters one can perform very close to feedback scheme without contention. A numerical result is provided in support of the analysis.

Original languageEnglish
Title of host publication2010 IEEE 21st International Symposium on Personal Indoor and Mobile Radio Communications, PIMRC 2010
Pages1442-1446
Number of pages5
DOIs
Publication statusPublished - 2010
Event2010 IEEE 21st International Symposium on Personal Indoor and Mobile Radio Communications, PIMRC 2010 - Istanbul, Turkey
Duration: 2010 Sep 262010 Sep 30

Publication series

NameIEEE International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC

Other

Other2010 IEEE 21st International Symposium on Personal Indoor and Mobile Radio Communications, PIMRC 2010
CountryTurkey
CityIstanbul
Period10/9/2610/9/30

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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  • Cite this

    Baek, S. J. (2010). An analysis of contention-based feedback schemes for score-based schedulers. In 2010 IEEE 21st International Symposium on Personal Indoor and Mobile Radio Communications, PIMRC 2010 (pp. 1442-1446). [5671985] (IEEE International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC). https://doi.org/10.1109/PIMRC.2010.5671985